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Ask the Experts


I haven’t heard of negative air ionization therapy before. What is it?

Answered by: Michael Terman

Negative ions are naturally occurring charged air particles that are always circulating in the environment around you.

Summer air, in contrast to winter air, is highly concentrated with negative ions. The negative ion machines we use are designed to mimic summer-like conditions by supplementing the sparse winter ion supply.

We are finding that this evokes beneficial mood effects. Although the ions emitted from the machines are not perceptible to your senses, studies have indicated clear improvement in patients with winter depression (the method has yet to be tested for other kinds of depression).

The method does have an interesting precedent, in that many electronic air purifiers utilize negative ion technology. However, don’t expect your air purifier to deliver antidepressant effects—most often, the dose would be far too low, and we are evaluating special apparatus for this purpose.